/*
** $Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp $
** Lua compiler (saves bytecodes to files; also lists bytecodes)
** See Copyright Notice in lua.h
*/

#define luac_c
#define LUA_CORE

#include "lprefix.h"

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "lua.h"
#include "lauxlib.h"

#include "lobject.h"
#include "lstate.h"
#include "lundump.h"

static void PrintFunction(const Proto *f, int full);
#define luaU_print  PrintFunction

#define PROGNAME    "luac"      /* default program name */
#define OUTPUT      PROGNAME ".out" /* default output file */

static int listing = 0;         /* list bytecodes? */
static int dumping = 1;         /* dump bytecodes? */
static int stripping = 0;       /* strip debug information? */
static char Output[] = { OUTPUT };  /* default output file name */
static const char *output = Output; /* actual output file name */
static const char *progname = PROGNAME; /* actual program name */

static void fatal(const char *message)
{
    fprintf(stderr, "%s: %s\n", progname, message);
    exit(EXIT_FAILURE);
}

static void cannot(const char *what)
{
    fprintf(stderr, "%s: cannot %s %s: %s\n", progname, what, output, strerror(errno));
    exit(EXIT_FAILURE);
}

static void usage(const char *message)
{
    if (*message == '-')
        fprintf(stderr, "%s: unrecognized option '%s'\n", progname, message);
    else
        fprintf(stderr, "%s: %s\n", progname, message);
    fprintf(stderr,
            "usage: %s [options] [filenames]\n"
            "Available options are:\n"
            "  -l       list (use -l -l for full listing)\n"
            "  -o name  output to file 'name' (default is \"%s\")\n"
            "  -p       parse only\n"
            "  -s       strip debug information\n"
            "  -v       show version information\n"
            "  --       stop handling options\n"
            "  -        stop handling options and process stdin\n"
            , progname, Output);
    exit(EXIT_FAILURE);
}

#define IS(s)   (strcmp(argv[i],s)==0)

static int doargs(int argc, char *argv[])
{
    int i;
    int version = 0;
    if (argv[0] != NULL && *argv[0] != 0) progname = argv[0];
    for (i = 1; i < argc; i++)
    {
        if (*argv[i] != '-')          /* end of options; keep it */
            break;
        else if (IS("--"))            /* end of options; skip it */
        {
            ++i;
            if (version) ++version;
            break;
        }
        else if (IS("-"))         /* end of options; use stdin */
            break;
        else if (IS("-l"))            /* list */
            ++listing;
        else if (IS("-o"))            /* output file */
        {
            output = argv[++i];
            if (output == NULL || *output == 0 || (*output == '-' && output[1] != 0))
                usage("'-o' needs argument");
            if (IS("-")) output = NULL;
        }
        else if (IS("-p"))            /* parse only */
            dumping = 0;
        else if (IS("-s"))            /* strip debug information */
            stripping = 1;
        else if (IS("-v"))            /* show version */
            ++version;
        else                  /* unknown option */
            usage(argv[i]);
    }
    if (i == argc && (listing || !dumping))
    {
        dumping = 0;
        argv[--i] = Output;
    }
    if (version)
    {
        printf("%s\n", LUA_COPYRIGHT);
        if (version == argc - 1) exit(EXIT_SUCCESS);
    }
    return i;
}

#define FUNCTION "(function()end)();"

static const char *reader(lua_State *L, void *ud, size_t *size)
{
    UNUSED(L);
    if ((*(int *)ud)--)
    {
        *size = sizeof(FUNCTION) - 1;
        return FUNCTION;
    }
    else
    {
        *size = 0;
        return NULL;
    }
}

#define toproto(L,i) getproto(L->top+(i))

static const Proto *combine(lua_State *L, int n)
{
    if (n == 1)
        return toproto(L, -1);
    else
    {
        Proto *f;
        int i = n;
        if (lua_load(L, reader, &i, "=(" PROGNAME ")", NULL) != LUA_OK) fatal(lua_tostring(L, -1));
        f = toproto(L, -1);
        for (i = 0; i < n; i++)
        {
            f->p[i] = toproto(L, i - n - 1);
            if (f->p[i]->sizeupvalues > 0) f->p[i]->upvalues[0].instack = 0;
        }
        f->sizelineinfo = 0;
        return f;
    }
}

static int writer(lua_State *L, const void *p, size_t size, void *u)
{
    UNUSED(L);
    return (fwrite(p, size, 1, (FILE *)u) != 1) && (size != 0);
}

static int pmain(lua_State *L)
{
    int argc = (int)lua_tointeger(L, 1);
    char **argv = (char **)lua_touserdata(L, 2);
    const Proto *f;
    int i;
    if (!lua_checkstack(L, argc)) fatal("too many input files");
    for (i = 0; i < argc; i++)
    {
        const char *filename = IS("-") ? NULL : argv[i];
        if (luaL_loadfile(L, filename) != LUA_OK) fatal(lua_tostring(L, -1));
    }
    f = combine(L, argc);
    if (listing) luaU_print(f, listing > 1);
    if (dumping)
    {
        FILE *D = (output == NULL) ? stdout : fopen(output, "wb");
        if (D == NULL) cannot("open");
        lua_lock(L);
        luaU_dump(L, f, writer, D, stripping);
        lua_unlock(L);
        if (ferror(D)) cannot("write");
        if (fclose(D)) cannot("close");
    }
    return 0;
}

int main(int argc, char *argv[])
{
    lua_State *L;
    int i = doargs(argc, argv);
    argc -= i;
    argv += i;
    if (argc <= 0) usage("no input files given");
    L = luaL_newstate();
    if (L == NULL) fatal("cannot create state: not enough memory");
    lua_pushcfunction(L, &pmain);
    lua_pushinteger(L, argc);
    lua_pushlightuserdata(L, argv);
    if (lua_pcall(L, 2, 0, 0) != LUA_OK) fatal(lua_tostring(L, -1));
    lua_close(L);
    return EXIT_SUCCESS;
}

/*
** $Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp $
** print bytecodes
** See Copyright Notice in lua.h
*/

#include <ctype.h>
#include <stdio.h>

#define luac_c
#define LUA_CORE

#include "ldebug.h"
#include "lobject.h"
#include "lopcodes.h"

#define VOID(p)     ((const void*)(p))

static void PrintString(const TString *ts)
{
    const char *s = getstr(ts);
    size_t i, n = tsslen(ts);
    printf("%c", '"');
    for (i = 0; i < n; i++)
    {
        int c = (int)(unsigned char)s[i];
        switch (c)
        {
        case '"':
            printf("\\\"");
            break;
        case '\\':
            printf("\\\\");
            break;
        case '\a':
            printf("\\a");
            break;
        case '\b':
            printf("\\b");
            break;
        case '\f':
            printf("\\f");
            break;
        case '\n':
            printf("\\n");
            break;
        case '\r':
            printf("\\r");
            break;
        case '\t':
            printf("\\t");
            break;
        case '\v':
            printf("\\v");
            break;
        default:
            if (isprint(c))
                printf("%c", c);
            else
                printf("\\%03d", c);
        }
    }
    printf("%c", '"');
}

static void PrintConstant(const Proto *f, int i)
{
    const TValue *o = &f->k[i];
    switch (ttype(o))
    {
    case LUA_TNIL:
        printf("nil");
        break;
    case LUA_TBOOLEAN:
        printf(bvalue(o) ? "true" : "false");
        break;
    case LUA_TNUMFLT:
    {
        char buff[100];
        sprintf(buff, LUA_NUMBER_FMT, fltvalue(o));
        printf("%s", buff);
        if (buff[strspn(buff, "-0123456789")] == '\0') printf(".0");
        break;
    }
    case LUA_TNUMINT:
        printf(LUA_INTEGER_FMT, ivalue(o));
        break;
    case LUA_TSHRSTR:
    case LUA_TLNGSTR:
        PrintString(tsvalue(o));
        break;
    default:              /* cannot happen */
        printf("? type=%d", ttype(o));
        break;
    }
}

#define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-")
#define MYK(x)      (-1-(x))

static void PrintCode(const Proto *f)
{
    const Instruction *code = f->code;
    int pc, n = f->sizecode;
    for (pc = 0; pc < n; pc++)
    {
        Instruction i = code[pc];
        OpCode o = GET_OPCODE(i);
        int a = GETARG_A(i);
        int b = GETARG_B(i);
        int c = GETARG_C(i);
        int ax = GETARG_Ax(i);
        int bx = GETARG_Bx(i);
        int sbx = GETARG_sBx(i);
        int line = getfuncline(f, pc);
        printf("\t%d\t", pc + 1);
        if (line > 0) printf("[%d]\t", line);
        else printf("[-]\t");
        printf("%-9s\t", luaP_opnames[o]);
        switch (getOpMode(o))
        {
        case iABC:
            printf("%d", a);
            if (getBMode(o) != OpArgN) printf(" %d", ISK(b) ? (MYK(INDEXK(b))) : b);
            if (getCMode(o) != OpArgN) printf(" %d", ISK(c) ? (MYK(INDEXK(c))) : c);
            break;
        case iABx:
            printf("%d", a);
            if (getBMode(o) == OpArgK) printf(" %d", MYK(bx));
            if (getBMode(o) == OpArgU) printf(" %d", bx);
            break;
        case iAsBx:
            printf("%d %d", a, sbx);
            break;
        case iAx:
            printf("%d", MYK(ax));
            break;
        }
        switch (o)
        {
        case OP_LOADK:
            printf("\t; ");
            PrintConstant(f, bx);
            break;
        case OP_GETUPVAL:
        case OP_SETUPVAL:
            printf("\t; %s", UPVALNAME(b));
            break;
        case OP_GETTABUP:
            printf("\t; %s", UPVALNAME(b));
            if (ISK(c))
            {
                printf(" ");
                PrintConstant(f, INDEXK(c));
            }
            break;
        case OP_SETTABUP:
            printf("\t; %s", UPVALNAME(a));
            if (ISK(b))
            {
                printf(" ");
                PrintConstant(f, INDEXK(b));
            }
            if (ISK(c))
            {
                printf(" ");
                PrintConstant(f, INDEXK(c));
            }
            break;
        case OP_GETTABLE:
        case OP_SELF:
            if (ISK(c))
            {
                printf("\t; ");
                PrintConstant(f, INDEXK(c));
            }
            break;
        case OP_SETTABLE:
        case OP_ADD:
        case OP_SUB:
        case OP_MUL:
        case OP_POW:
        case OP_DIV:
        case OP_IDIV:
        case OP_BAND:
        case OP_BOR:
        case OP_BXOR:
        case OP_SHL:
        case OP_SHR:
        case OP_EQ:
        case OP_LT:
        case OP_LE:
            if (ISK(b) || ISK(c))
            {
                printf("\t; ");
                if (ISK(b)) PrintConstant(f, INDEXK(b));
                else printf("-");
                printf(" ");
                if (ISK(c)) PrintConstant(f, INDEXK(c));
                else printf("-");
            }
            break;
        case OP_JMP:
        case OP_FORLOOP:
        case OP_FORPREP:
        case OP_TFORLOOP:
            printf("\t; to %d", sbx + pc + 2);
            break;
        case OP_CLOSURE:
            printf("\t; %p", VOID(f->p[bx]));
            break;
        case OP_SETLIST:
            if (c == 0) printf("\t; %d", (int)code[++pc]);
            else printf("\t; %d", c);
            break;
        case OP_EXTRAARG:
            printf("\t; ");
            PrintConstant(f, ax);
            break;
        default:
            break;
        }
        printf("\n");
    }
}

#define SS(x)   ((x==1)?"":"s")
#define S(x)    (int)(x),SS(x)

static void PrintHeader(const Proto *f)
{
    const char *s = f->source ? getstr(f->source) : "=?";
    if (*s == '@' || *s == '=')
        s++;
    else if (*s == LUA_SIGNATURE[0])
        s = "(bstring)";
    else
        s = "(string)";
    printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n",
           (f->linedefined == 0) ? "main" : "function", s,
           f->linedefined, f->lastlinedefined,
           S(f->sizecode), VOID(f));
    printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
           (int)(f->numparams), f->is_vararg ? "+" : "", SS(f->numparams),
           S(f->maxstacksize), S(f->sizeupvalues));
    printf("%d local%s, %d constant%s, %d function%s\n",
           S(f->sizelocvars), S(f->sizek), S(f->sizep));
}

static void PrintDebug(const Proto *f)
{
    int i, n;
    n = f->sizek;
    printf("constants (%d) for %p:\n", n, VOID(f));
    for (i = 0; i < n; i++)
    {
        printf("\t%d\t", i + 1);
        PrintConstant(f, i);
        printf("\n");
    }
    n = f->sizelocvars;
    printf("locals (%d) for %p:\n", n, VOID(f));
    for (i = 0; i < n; i++)
    {
        printf("\t%d\t%s\t%d\t%d\n",
               i, getstr(f->locvars[i].varname), f->locvars[i].startpc + 1, f->locvars[i].endpc + 1);
    }
    n = f->sizeupvalues;
    printf("upvalues (%d) for %p:\n", n, VOID(f));
    for (i = 0; i < n; i++)
    {
        printf("\t%d\t%s\t%d\t%d\n",
               i, UPVALNAME(i), f->upvalues[i].instack, f->upvalues[i].idx);
    }
}

static void PrintFunction(const Proto *f, int full)
{
    int i, n = f->sizep;
    PrintHeader(f);
    PrintCode(f);
    if (full) PrintDebug(f);
    for (i = 0; i < n; i++) PrintFunction(f->p[i], full);
}
